View Compilation Error

0_0_37776575_4035.cpp: In function 'void solve()':
0_0_37776575_4035.cpp:9:6: error: expected initializer before '.' token
  LL k.sum=0;
      ^
0_0_37776575_4035.cpp:10:25: error: 'k' was not declared in this scope
  scanf("%d %lld %d",&n,&k,&m);
                         ^
0_0_37776575_4035.cpp:16:3: error: 'sum' was not declared in this scope
   sum+=a[i];
   ^